Ink jet recording head and method for manufacturing the same

Details Ink jet recording head and method for manufacturing the same Ink jet recording head and method for manufacturing the same

2011-03-08

2011-03-08

Rahll, Jerry T (Department: 2874)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C257S737000

Reexamination Certificate

active

07901045

ABSTRACT:
The present invention provides an ink jet recording head which includes a substrate, an energy generating element which is disposed on the substrate and generates energy for discharging a liquid, an electrode which is disposed on the substrate and is electrically connected to the energy generating element, a passage-forming member which is disposed on the substrate, an adhesion layer which is disposed on the substrate and facilitates adhesion between the passage-forming member and the substrate, and a bump disposed on the electrode. The area of an upper surface of the bump is larger than the area of a lower surface of the bump, the lower surface being located on the substrate side, the upper surface being located opposite the lower surface, and a side face of the bump is covered with the adhesion layer. Thereby, a protective film is formed around the bump.

REFERENCES:
patent: 5757078 (1998-05-01), Matsuda et al.
patent: 6629755 (2003-10-01), Saito et al.
patent: 2004-296497 (2004-10-01), None

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